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Honda Accord Real World MPG

2672 messages,  Last post on Nov 23, 2009 at 2:36 PM

You are in the Honda Accord Forum. Your Hosts are pat & karens

What is this discussion about? Honda Accord, Fuel Efficiency (MPG)


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#1661 of 2672
Re: WHAT ARE U GETTING on 2008 V6 w/VCM [sunnfun] by ljgbjg
Apr 07, 2008 (7:01 am)
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Replying to: sunnfun (Mar 27, 2008 3:47 pm)

Post 1629 by sunnfun - "I have not thought about or tried. I wonder if the compressor goes on and off like the older versions do? (I am assuming so) and if that is the case, how will that match up with the VCM? The car may not stop "moving" or "changing" while on the highway with the A/C on. Between the VCM changing and the AC going off and on, I may go mad. I'll have to try this tomorrow and see what happens."
 
Oh dear lord please no - if so I may be in the padded room next to you!
#1662 of 2672
Re: 2008 EXL V6 [bvdj84] by plethysmo
Apr 08, 2008 (7:29 am)
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Replying to: bvdj84 (Apr 07, 2008 5:34 am)

Your are correct to claim that Honda V6 engines take a long time to break in. I have kept records of the 216 fill-ups on my 06 Accord coupe LX-V6, 85704 miles, 3022.783 gallons. I plotted a 1 year running average mileage chart, to minimize seasonal affects. This chart shows a constant .3 mpg improvement each year over the first 4 years. At that time I got new tires and the 1 year running average declined 1 mpg. Once the new tire effect was fully in the running average, it is increasing again.
  
The decrease due to the new Michelin Energy MXV4 tires was not surprising, since they were softer and quieter than whatever came from Honda.
 
No evidence of a rapid mileage improvement over the first few thousand miles as some 4cyl Accord owners have reported.
#1663 of 2672
Re: 2008 EXL V6 [plethysmo] by ljgbjg
Apr 08, 2008 (7:55 am)
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Replying to: plethysmo (Apr 08, 2008 7:29 am)

New tires can have a huge impact on fuel economy.
 
1. Full tread depth versus that on a worn tire
2. Tread pattern can have a big effect on the rolling resistance of the tire
3. Softness or hardness of the rubber compound can affect mileage.
4. Speed rating - the higher speed tires are generally performance tires with softer
     rubber compounds.
 
Passenger car tires are in some way or another some compromise - handling and performance for ride and comfort, decreased rolling resistance for aggressive tread and rain water dispersion. Unfortunately, unlike F1 or other race cars - we have to do with one kind of tire for all conditions - race cars can and do change from soft aggressive rain tires to dry weather smooth surface tires for high performance.
 
If you live in AZ, I suspect you seldom need rain tires, so you can go for a hard rubber compound with low rolling resistance and a less agrressive tread pattern. Seattle? Softer rubber, aggressive water dispersing tread pattern and higher rolling resistance. The exact same car's mileage will vary with locale and types of tires.
 
Most GOOD tire merchants will have comparison charts for you that have them rated for rolling resistance, noise, revolutions/mile, etc.
 
Changing tires can have an enormous impact on MPG - sometimes for the better, sometimes not.
#1664 of 2672
Re: 2008 I4 LX-P Automatic [fventura] by malmouza
Apr 08, 2008 (12:40 pm)
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Replying to: fventura (Mar 25, 2008 3:58 pm)

I think most people they are not aware of one technical aspect of the new 2008 Honda Accord 4 cylinders and 6 cylinders; they both have a drive-by-wire, where the throttle open and close electronicly when the driver press the gas pedal, instead of the old mechanical cable. This has a very bad effect on the fuel consumption. I tested this behavior using SCANGUAGE tool, and I saw that sometime you're pressing the gas pedal more than you need to, in other word the gas pedal is very sensitive, and it does not give much information about the throttle position. Using the scanguage tool as a reference, I can manage 25 MPG on my 2008 accord sdn (4 bangers). I hope this help.
#1665 of 2672
best so far by stickguy
Apr 08, 2008 (6:19 pm)
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just did a round trip from Philly to NY (about 240 miles). Mostly highway, a little local in the middle. For a change, no traffic delays. Lots of troopers, so I mostly ran 65-70.
 
Got a tick under 36 (35.9). Just me, no luggage to speak of, no AC and windows and roof closed.
 
IMO, about the best I am ever likely to do, and pretty darned good for a car this size and comfortable.
 
2005 EX-L 4 cyl 5 speed stick (just hitting 24K on it).
#1666 of 2672
Re: best so far [stickguy] by thegraduate
Apr 08, 2008 (7:13 pm)
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Replying to: stickguy (Apr 08, 2008 6:19 pm)

Got a tick under 36 (35.9). Just me, no luggage to speak of, no AC and windows and roof closed.
  
IMO, about the best I am ever likely to do, and pretty darned good for a car this size and comfortable.

 
And don't forget quick! A manual transmission Accord can run low 7s to 60 MPH. That's faster than the pocket rockets of a few years ago! I have the auto, so not quite as quick and involving, but it gets better highway mileage (taller gearing) and is great in point and shoot traffic. I love it!
 
TheGrad
2006 Accord EX I4 5AT
#1667 of 2672
Re: best so far [thegraduate] by ljgbjg
Apr 09, 2008 (1:45 am)
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Replying to: thegraduate (Apr 08, 2008 7:13 pm)

7th Generation was a great one consistently got 29-30 with a V6 A/T coupe on the highway.
#1668 of 2672
Re: best so far [ljgbjg] by malmouza
Apr 09, 2008 (5:11 am)
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Replying to: ljgbjg (Apr 09, 2008 1:45 am)

I own 2008 accord 4cyl 5speed MT (300 miles on the odo). and it does not matter what you do, you will always get the same 25 MPG, and I am considering myself as a hypermiles expert, this might be due to the engine parts are still tight in the engine, and the manufacturer use a heavy oil grade to minimize the noise and the friction for the first 1000s miles. Again, this is One big car, that weight a lot, and physics talks. In stop and go traffic, I don’t think anybody will get better than 20 MPG. On a new engine.
#1669 of 2672
Re: best so far [malmouza] by ljgbjg
Apr 09, 2008 (5:23 am)
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Replying to: malmouza (Apr 09, 2008 5:11 am)

I agree with you - this is one big car. I wonder what the CD is compeared to the 7th Generation? The front end appears to be boxier and with greater exposure than a 2007 which had the sloping hoodline. A greater CD combined with the heavier weight - the V6 is 300 pounds heavier than last year (so much for the extra 24 HP) will = lower fuel economy, REGARDLESS of the VCM. You are doing well - I am reading here about EXL models with the 190 HP I4 getting 17!.
#1670 of 2672
Re: best so far [ljgbjg] by dpmeersman
Apr 09, 2008 (6:05 am)
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Replying to: ljgbjg (Apr 09, 2008 5:23 am)

Taken from Motor Trend article comparing 07 Camry to 08 Accord Sedan:
 
No projections are needed in the wind tunnel, though, as the Accord has already bettered its performance due to a drop in the coefficient of drag from 0.34 to 0.31.
I'd like to know how they accomplished that as the frontal area does appear to be more substantial than the gen 7's.

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